package cn.com.cookie;

import jakarta.servlet.*;
import jakarta.servlet.http.*;
import jakarta.servlet.annotation.*;

import java.io.IOException;

@WebServlet(name = "userCookie", value = "/userCookie")
public class userCookie extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1. 创建并发送Cookie到浏览器
        // 创建Cookie对象，参数是键和值
        Cookie userCookie = new Cookie("username", "张三");
        // 设置Cookie的有效期（秒），这里设置为1天
        userCookie.setMaxAge(24 * 60 * 60);
        // 设置Cookie的路径，"/"表示整个网站都可以访问
        userCookie.setPath("/");
        // 将Cookie添加到响应中，发送给浏览器
        response.addCookie(userCookie);

        //2. 从浏览器读取Cookie
        // 从请求中获取所有Cookie
        Cookie[] cookies = request.getCookies();
        // 判断是否有Cookie
        if (cookies != null) {
            // 遍历所有Cookie
            for (Cookie cookie : cookies) {
                // 获取Cookie的名称
                String name = cookie.getName();

                // 判断是否是我们需要的Cookie
                if ("username".equals(name)) {
                    // 获取Cookie的值
                    String value = cookie.getValue();
                    System.out.println("用户名：" + value);
                }
            }
        }
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}
